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MCQs

Total Questions : 211 | Page 2 of 22 pages
Question 11. Which of the following statements about energy metabolism is false?
  1.    The energy that powers living systems ultimately comes from the sun
  2.    All animals in some way rely on plants for their energy
  3.    Plants provide the water and CO₂ that animals need to carry out respiration
  4.    All eukaryotic organisms carry out respiration in the presence of O₂
 Discuss Question
Answer: Option C. -> Plants provide the water and CO₂ that animals need to carry out respiration
Answer: (c).Plants provide the water and CO₂ that animals need to carry out respiration
Question 12. In noncyclic photophosphorylation, the ultimate acceptor of electrons that have been produced from the splitting of water is
  1.    NADP+
  2.    chlorophyll a
  3.    carbon dioxide
  4.    chlorophyll b
 Discuss Question
Answer: Option C. -> carbon dioxide
Answer: (c).carbon dioxide
Question 13. The manufacture of ATP in both photosynthesis and respiration is made possible by
  1.    the existence of a proton gradient across specific membranes
  2.    the action of ATP synthase
  3.    energy from the movement of electrons
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Answer: (d).All of the above
Question 14. The breakdown of glucose occurs by the process known as
  1.    glycolysis
  2.    fermentation
  3.    anaerobic respiration
  4.    Krebs cycle
 Discuss Question
Answer: Option A. -> glycolysis
Answer: (a).glycolysis
Question 15. The end products of noncyclic photophosphorylation are
  1.    O₂, ATP and NADPH
  2.    carbon dioxide, PGAL (phosphoglyceraldehyde), and H2
  3.    water, ADP and NADP+
  4.    carbon dioxide, ATP and water
 Discuss Question
Answer: Option A. -> O₂, ATP and NADPH
Answer: (a).O₂, ATP and NADPH
Question 16. More ATP is manufactured during __________ than at any other time in all of cellular metabolism.
  1.    fermentation
  2.    glycolysis
  3.    the light reactions of photosynthesis
  4.    oxidative phosphorylation
 Discuss Question
Answer: Option D. -> oxidative phosphorylation
Answer: (d).oxidative phosphorylation
Question 17. Where does the O₂ come from that is essential for the proper functioning of oxidative phosphorylation?
  1.    Fermentation
  2.    Light reactions of photosynthesis
  3.    Dark reactions of photosynthesis
  4.    Carbon fixation
 Discuss Question
Answer: Option B. -> Light reactions of photosynthesis
Answer: (b).Light reactions of photosynthesis
Question 18. Carbon fixation requires the expenditure of ATP molecules which is generated by
  1.    formation of glucose during the Calvin cycle
  2.    replenishment of chlorophyll
  3.    ETS (electron transfer system) during the light reactions
  4.    none of the above
 Discuss Question
Answer: Option C. -> ETS (electron transfer system) during the light reactions
Answer: (c).ETS (electron transfer system) during the light reactions
Question 19. Electron transport systems play a vital role in
  1.    Calvin cycle
  2.    photorespiration
  3.    light-dependent reactions
  4.    all of these
 Discuss Question
Answer: Option C. -> light-dependent reactions
Answer: (c).light-dependent reactions
Question 20. Antenna complexes, electron transport chains, and carbon fixation are all found in
  1.    animal cells
  2.    bacterial cells
  3.    plant cells
  4.    association with the reactions of the citric acid cycle
 Discuss Question
Answer: Option C. -> plant cells
Answer: (c).plant cells

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